Cover panel of a box blank



FIG. 1 is a perspective view of a cover panel of a box blank showing my new design, the broken line showing of the adjacent appended components is for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is a top view of the cover panel, the bottom view being identical;

FIG. 3 is a front elevation view of the cover panel;

FIG. 4 is a left side view elevation view of the cover panel;

FIG. 5 is a right side view elevation view of the cover panel; and,

FIG. 6 is a rear elevation view of the cover panel. 

The ornamental design for a cover panel of a box blank, as shown and described. 